DKA790GX Platinum RAM questions

Hello everyone.  I've done quite a bit of thinking about what direction to take for my next computer and I've decided that I really like the features that the DKA790GX Platinum motherboard has to offer.  However, I've heard some people say that they've had issues when dealing with DDR2 1066 RAM not on the MSI board specifically, but other 790GX based motherboards.  Will DDR2 1066 run in dual channel mode with a Phenom processor installed?  Some people have said that it wouldn't.  I plan on getting 2x2GB chips for a total of 4GB of RAM if that information will be of use.  Secondly, I've been eyeing some of the high end Mushkin memory since I've had nothing but great luck with them.  This memory uses 2.0 - 2.1 volts.  I don't think it would be a problem, but the motherboard specs specifically say that 1.8v memory is the standard supported.  Do you think that all will be well when using the higher voltage memory?
I guess I have one more question before signing off that doesn't have much of anything to do with RAM.  I'm foregoing getting a Windows OS for this computer initially due to the possibility that MS will be releasing Windows 7 on the market sooner than anticipated (supposedly in the first half of next year).  If that OS turns out to be a great deal better than Vista, I'd rather just purchase an OS once rather than upgrade 6 months or so later.  Having said that, I plan on using Linux (Ubuntu 8.04) until I can make a good decision on which version of Windows to support.  How would I go about upgrading my BIOS since I won't have a Windows OS initially?  I just looked through the readme and it still says to use an ME or 98 boot disk to flash the BIOS.  I figured maybe somebody else may give me some tips on doing this outside of Windows.  That would be greatly appreciated.  Thanks for all advice that you can give me.

The cpu is designed to run four sticks, but at 1.8 volts.  That's where the catch is because most memory rated at 1066 uses higher voltages  The Bios Kernal Developers Guide AMD has posted on their web site from April does indicate what you are stating, but if you contact AMD support, they will tell you otherwise.  I swear AMD is still beta testing Phenoms long after they were released.  Running the memory I have at 1066 is not supported by AMD, only 1.8 volt memory is.  If the bios is written by the motherboard manufacturer to support the memory as mine obviously is on this board, it will work.  Since MSI has gone to the trouble of supporting this memory and it is some of the first 1066 sticks made, I have to believe most other 1066 memory using voltages other than 1.8 will work.  Below is the response I received from AMD several months ago on this issue concerning another manufacturer's board that is now in the trash for other issues.  The manufacturer in their qualified vendors list stated the memory would work, but it never did.  The e-mail is several months old now so one of the links no longer works.  Not knowing the forum rules here very well, I did block the manufacturer's name and the tech's name.  In the e-mail and in a follow up phone call, AMD is saying if the memory doesn't work, the motherboard manufacturer needs to fix the bios.
Dear Customer,
Thank you for contacting AMD Customer Care.
AMD Phenom processors are able to support four DDR2-1066 memory modules which are JEDEC certified to operate at 1.8V.
Please be informed that the Kingston memory modules that you have is only certified to function within Jedec specification at 800MHz at 1.8V.
The 1066MHz specification validated by Kingston is out of spec and may not work.
You may either wish to check with A*** for updated BIOS support or run the 4 modules in DDR2-800 mode.
I have included the following links for your reference:
http://www.amd.com/us-en/Processors/ProductI
http://www.valueram.com/datasheets/KHX8500D2_1G.pdf
AMD Customer Care

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